2181612354264 has 192 divisors, whose sum is σ = 7353114912000. Its totient is φ = 570149072640.

The previous prime is 2181612354227. The next prime is 2181612354277. The reversal of 2181612354264 is 4624532161812.

2181612354264 is a `hidden beast` number, since 2 + 1 + 8 + 1 + 612 + 3 + 5 + 4 + 26 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3650242 + ... + 4205649.

It is an arithmetic number, because the mean of its divisors is an integer number (38297473500).

Almost surely, 2^{2181612354264} is an apocalyptic number.

2181612354264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2181612354264 is an abundant number, since it is smaller than the sum of its proper divisors (5171502557736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2181612354264 is a wasteful number, since it uses less digits than its factorization.

2181612354264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7855958 (or 7855951 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The spelling of 2181612354264 in words is "two trillion, one hundred eighty-one billion, six hundred twelve million, three hundred fifty-four thousand, two hundred sixty-four".